<template>
    <div class="home-container">
        <!-- 导航栏 -->
        <van-nav-bar class="page-nav-bar">
            <van-button
                class="search-btn"
                slot="title"
                type="info"
                size="small"
                round
                icon="search"
                to="/search"
            >搜索</van-button>
        </van-nav-bar>
        <!-- /导航栏 -->

        <!-- 频道列表 -->
        <!--
          通过 v-model 绑定当前激活标签对应的索引值，默认情况下启用第一个标签
          通过 animated 属性可以开启切换标签内容时的转场动画
          通过 swipeable 属性可以开启滑动切换标签页
         -->
        <van-tabs class="channel-tabs" v-model="active" swipeable>
            <van-tab
                :title="channel.name"
                v-for="channel in channels"
                :key="channel.id"
            >
<!--                 文章列表-->
                <article-list ref="article-list" :channel="channel" />
<!--                 文章列表-->
            </van-tab>
            <div slot="nav-right" class="placeholder"></div>
            <div
                slot="nav-right"
                class="hamburger-btn"
                @click="isChennelEditShow = true"
            >
<!--                <i class="toutiao toutiao-gengduo icon"></i>&lt;!&ndash; 使用字体图标编码 &ndash;&gt;-->
                <span class="toutiao-icon ">&#xe614;</span> <!-- 使用字体图标编码 -->
            </div>
        </van-tabs>
<!--         /频道列表 -->

        <!-- 频道编辑弹出层 -->
        <van-popup
            class="edit-channel-popup"
            v-model="isChennelEditShow"
            closeable
            close-icon-position="top-left"
            position="bottom"
            :style="{ height: '100%' }"
        >
            <!-- 频道编辑 -->
            <channel-edit
                :my-channels="channels"
                :active="active"
                @update-active="onUpdateActive"/>
            <!-- /频道编辑 -->
        </van-popup>
        <!-- /频道编辑弹出层 -->
    </div>
</template>

<script>
import { getUserChannels } from '@/api/user'
import ArticleList from './components/article-list'
import ChannelEdit from './components/channel-edit'
import { mapState } from 'vuex'
import { getItem } from '@/utils/storage'

export default {
  name: 'HomeIndex',
  components: {
    ArticleList,
    ChannelEdit
  },
  props: {},
  data () {
    return {
      active: 0,
      channels: [], // 频道列表
      isChennelEditShow: false // 控制编辑频道弹出层的显示状态
    }
  },
  computed: {
    ...mapState(['user'])
  },
  watch: {},
  created () {
    this.loadChannels()
  },
  mounted () {},
  methods: {
    async loadChannels () {
      try {
        // const { data } = await getUserChannels()
        // this.channels = data.data.channels
        let channels = []

        if (this.user) {
          // 已登录，请求获取用户频道列表
          const { data } = await getUserChannels()
          channels = data.data.channels
        } else {
          // 未登录，判断是否有本地的频道列表数据
          const localChannels = getItem('TOUTIAO_CHANNELS')
          //    有，拿来使用
          if (localChannels) {
            channels = localChannels
          } else {
            //    没有，请求获取默认频道列表
            const { data } = await getUserChannels()
            channels = data.data.channels
          }
        }

        this.channels = channels
      } catch (err) {
        this.$toast('获取频道数据失败')
      }
    },

    onUpdateActive (index, isChennelEditShow = true) {
      // 更新激活的频道项
      this.active = index

      // 关闭编辑频道弹层
      this.isChennelEditShow = isChennelEditShow
    }
  }
}
</script>

<style scoped lang="less">

.toutiao-icon{
    font-family: 'toutiao'; /* 替换为你实际的字体名称 */
    font-size: 33px;
}

.home-container {
    .van-nav-bar__title {
        max-width: unset;
    }
    .search-btn {
        width: 555px;
        height: 64px;
        background-color: #5babfb;
        border: none;
        font-size: 28px;
        .van-icon {
            font-size: 32px;
        }
    }

    /deep/ .channel-tabs {
        .van-tab {
            border-right: 1px solid #edeff3;
            min-width: 200px;
            font-size: 30px;
            color: #777777;
        }

        .van-tab--active {
            color: #333333;
        }

        .van-tabs__nav {
            padding-bottom: 0;
        }

        .van-tabs__line {
            bottom: 8px;
            width: 31px !important;
            height: 6px;
            background-color: #3296fa;
        }

        .placeholder {
            flex-shrink: 0;
            width: 66px;
            height: 82px;
        }

        .hamburger-btn {
            position: fixed;
            right: 0;
            display: flex;
            justify-content: center;
            align-items: center;
            width: 66px;
            height: 82px;
            background-color: #fff;
            background-color: rgba(255, 255, 255, 0.902);
            &:before {
                content: "";
                position: absolute;
                left: 0;
                width: 1px;
                height: 58px;
                background-image: url('../../assets/gradient-gray-line.png');
                background-size: contain;
            }
        }
    }
}
</style>
